Specifications

4 Message Reference
68
4.5.2 LIU_MSG_R_STATS - LIU Read Statistics Request
Synopsis
Message used to read back performance statistics associated with a Line Interface Unit
(LIU).
Format
MESSAGE HEADER
Field Name
Meaning
type
LIU_MSG_R_STATS (0x5e36)
id
liu_id (in the range 0 to one less than the number of LIUs)
src
Sending module ID
dst
MVD_module_ID
rsp_req
Used to request a confirmation.
hclass
0
status
0 to read statistics
1 to read statistics and reset counters
err_info
0
len
42
PARAMETER AREA
Offset
Size
Name
0
2
version
2
2
Reserved. Must be set to 0.
4
4
duration
8
4
bit_errors
12
4
code_violations
16
4
frame_slips
20
4
oos_transitions
24
4
errored_seconds
28
4
severely_errored_seconds
32
2
prbs_status
34
4
Reserved. Must be set to 0.
38
4
Reserved. Must be set to 0.
Description
This message is used to collect performance statistics for a given Line Interface Unit
(LIU). A module requesting LIU statistic information is required to complete the
version parameter of the message, request a response, and set all additional
parameter values to zero.
The confirmation message shall feature a non-zero status in the event of an error. In
the event of successful retrieval of information, the message parameter field shall
contain LIU information as specified in the message format. The statistics can either be
read and left unchanged, or read and reset in a single operation depending on the
setting of the status field in the request message.